Quantifying the Distribution of Inhalation Exposure in Human Populations: 2. Distributions of Time Spent by Adults, Adolescents, and Children at Home, at Work, and at School

Using distributions of time spent at various ventilation levels, ranges of inhalation exposure in the population can be established. Distributions of exposure time were determined using results of a study by the California Air Resources Board (CARB) which focused on time spent by humans participating in various activities and the locations where the activities occurred. The daily at-home activities from the CARB study were assigned to one of three ventilation levels, generating aggregate time periods. Distinct age and gender populations were identified, and distributions for aggregate time were established for these populations at each of the ventilation levels. In addition to aggregate time spent at home, distributions for various ages and genders were established for aggregate time spent at school and work. By combining distributions of aggregate time with corresponding ventilation rates, the distribution of inhalation rates can be established for at home, at work, and at school exposures.     

Physical distribution: A suitable case for treatment

Physical distribution is a key, but neglected, function of business. Yet it is an area which offers tremendous opportunities for cost reduction, improved efficiency and better customer service. All these can contribute to increased profitability. Finding the means to achieve these improvements need not be a daunting task or one which requires sophisticated techniques. This article shows how ordinary solutions can be found and implemented by ordinary companies; how physical distribution should take its place as the important cost centre that it is; and the four major areas where cost savings can be most readily effected.     

Bayesian inference and model comparison for asymmetric smooth transition heteroskedastic models

Inference, quantile forecasting and model comparison for an asymmetric double smooth transition heteroskedastic model is investigated. A Bayesian framework in employed and an adaptive Markov chain Monte Carlo scheme is designed. A mixture prior is proposed that alleviates the usual identifiability problem as the speed of transition parameter tends to zero, and an informative prior for this parameter is suggested, that allows for reliable inference and a proper posterior, despite the non-integrability of the likelihood function. A formal Bayesian posterior model comparison procedure is employed to compare the proposed model with its two limiting cases: the double threshold GARCH and symmetric ARX GARCH models. The proposed methods are illustrated using both simulated and international stock market return series. Some illustrations of the advantages of an adaptive sampling scheme for these models are also provided. Finally, Bayesian forecasting methods are employed in a Value-at-Risk study of the international return series. The results generally favour the proposed smooth transition model and highlight explosive and smooth nonlinear behaviour in financial markets.     

Profits and incentive compensation in nonprofit firms

Incentive contracts based on profit sharing, cost reduction, or other measures of performance no longer need to endanger a nonprofit firm's tax exemption; such measures have been urged for adoption in the nonprofit sector. However, the nonprofit differs from the for-profit sector in that contracts have side effects on the solicitation and offering of donations and on the character of those who choose to work in the nonprofit sector. In addition, it is more difficult in the nonprofit sector to obtain an appropriate output measure for use in calculating bonuses.     

Life cycles of growing organizations: A review with implications for knowledge and learning

Conceptualizing growth trajectories of organizations in organismic terms describing transitions through a series of stages, from birth to maturity, has considerable intuitive appeal. Recently, the assumptions underpinning the life‐cycle perspective (growth is linear, sequential, deterministic and invariant) have been argued not to pertain to organizations. This paper reviews the literature on life‐cycle growth models, traces the development of a growing sophistication of conceptualizing growth and highlights some of the limitations of the literature. The authors make a contribution by proposing an alternative conceptual framework for thinking about growing businesses. The framework consists of two dimensions. First, a typology of key issues that are likely to be faced by all growing firms, and the discussion is shaped by M. Gladwell's (The Tipping Point: How Little Things Can Make a Big Difference. Boston: Little Brown, 2000) notion of ‘tipping points’. The second dimension is developed by drawing on the knowledge management literature and the concept of absorptive capacity ( Cohen, W.M. and Levinthal, D.A. (1990 ). Absorptive capacity: a new perspective on learning and innovation. Administrative Science Quarterly, 35 , 128–152). This concept is applied to a discussion of the state of an organization regarding its ability to absorb and use new knowledge. Further, it is suggested that the framework has value for both policy and practice and can be used for the design and specification of interventional support and, to identify and evaluate their impact. If interventions are to help firms to grow, they must provide the right knowledge or support in forms that the firm can utilize. Together, these two dimensions provide a framework to examine firm growth issues and to analyse the effectiveness of different interventions on firms in different states within this framework.     

Marketing in moderation— The marketing concept and the organization's structure

This paper discusses the marketing concept and its impact on the strategy and structure of the business organization. The popular dictum that every firm should implement the marketing concept in its extreme form is challenged. Considerations of the overall structure of the firm, the time period in question, the amount of resources available are included in the determination of the degree of implementation which should be made. Finally, the conclusion indicates that the popular view that a change in environment necessitates a change in the organizational structure should be modified. The cost may be too great for the benefits derived.     

Implementing the ecological approach in tobacco control programs: results of a case study

The ‘new public health’ has stimulated calls to adopt an ecological approach for action aimed at improving population health. However, the implementation of ecological programs has often remained a challenge. The objective of this study was to identify factors facilitating the implementation of ecological tobacco control programming in two Public Health Departments in Québec (Canada) using Scheirer's model of program implementation as a conceptual framework and an exemplary case study design. Analysis revealed two distinct configurations of environmental, organizational and professional characteristics that were related to equally successful implementations of the framework. Key roles for factors such as provincial ministerial guidelines and financial resources, human resources, and relationships and alliances with other organizations, were highlighted. These results replicate findings from quantitative surveys and allow better understanding of the conditions required for planning ecological programming.